Graphing Calculator Online
Plot functions, zoom into details, and trace exact points — free in your browser. No download and no account needed.
What Can You Do With This Graphing Calculator?
Plot Functions
Type any equation and see its graph instantly. Linear, quadratic, and trigonometric functions all work.
Compare Multiple Functions
Graph several equations at once. Each one gets its own color for easy comparison.
Zoom and Pan
Zoom into fine details or pull back for the full picture. Pan across the coordinate plane freely.
Trace Coordinates
Move along any curve and read exact x and y values. No estimating needed.
Adjust the Graph Window
Set your own X and Y ranges. Frame exactly the region you want to study.
How to Graph a Function
Step 1: Enter Your Function
Type your equation into the function input, for example y = 2x + 3.
Step 2: Open the Graph
Press the graph button. Your function plots on the coordinate plane.
Step 3: Adjust the Window
If the graph looks off, set Xmin, Xmax, Ymin, and Ymax to frame it well.
Step 4: Use Zoom and Trace
Zoom into points of interest. Trace along the curve to read coordinates.
Graphing Examples
Graph a Quadratic
Plot y = x² − 4. You will see a parabola crossing the x-axis at −2 and 2.
Graph a Linear Function
Plot y = 3x + 1. The line rises three units for every one unit right.
Graph a Trigonometric Function
Plot y = sin(x) in radian mode. The classic wave appears between −1 and 1.
Compare Two Functions
Plot y = x² and y = 2x + 3 together. See exactly where they intersect.
How to Find Intersections on a Graph
Graph both functions first. Look for the points where the curves cross. Use trace to move along one curve near the crossing. Read the coordinates at the closest point. For y = x² and y = 2x + 3, they meet at (−1, 1) and (3, 9).
How to Fix a Blank or Incorrect Graph
Check the Function
Make sure the equation is typed correctly. One wrong character breaks the plot.
Check the Graph Window
A blank screen often means the window is wrong. Reset to standard zoom first.
Check Parentheses
Missing parentheses change the math. Compare your entry against the original equation.
Check Angle Mode
Trig graphs look wrong in the wrong mode. Use radians for most calculus work.
Graphing Calculator for Algebra, Precalculus, Trigonometry & Calculus
Algebra
Graph lines and parabolas. Solve systems by finding intersections visually.
Precalculus
Explore transformations and composite functions. See shifts and stretches live.
Trigonometry
Plot sine, cosine, and tangent. Study amplitude, period, and phase shifts.
Calculus
Visualize derivatives and integrals. Check your hand calculations against the graph.
Online Graphing Calculator vs TI-84
| Feature | Online Graphing Calculator | TI-84 Handheld |
|---|---|---|
| Cost | Free | $100+ |
| Graphing speed | Instant | Fast |
| Trace & zoom | Yes | Yes |
| Exam allowed | No | Yes |
| Setup | None | Purchase needed |
Frequently Asked Questions
Is the graphing calculator free?
Yes. Every feature is free with no account.
Can I graph multiple functions?
Yes. Plot several at once in different colors.
Can I zoom and pan?
Yes. Zoom buttons and panning are built into the graph view.
What does Trace do?
Trace moves a cursor along the curve and shows exact coordinates.
Can I use it on mobile?
Yes. The graph view adapts to phone and tablet screens.
Does it work like a TI-84?
Yes. It mirrors TI-84 graphing behavior, including window settings and trace.
Do I need to download anything?
No. It runs fully in your browser.
Can I use it during an exam?
No. Exams require an approved physical calculator.